Composite building material.



s. W. BONSALL. COMPOSITE BUILDING MATERIAL. APPLICATION FILED NOV. 11, 1908.

944,592. Patented De0.28,1909.

2 SHEETS-SHEET l.

SfW. BONSALL. v COMPOSITE BUILDING MATERIAL.

APPLICATION FILED NOV. 11, 1908.

Patented De0.28,1909.

2 SHEETS-SHEET 2.

- berless applications of the-same will occur aaasaz.

w. scream, or new was, a. at; GQMPOSITE B'U'I-LZDIN'G MATERIAL: I

s eeifimiaa of Letters Patent. Patent d B 128, 1909.

Application filed November 11 Ios. seriar 1%. 462,158.

Togll whom it may concern:

Be it known that I, Sermons BonsALL, a citizen of the United States, residing int-he borough of Manhattan, city, county, and State of New York, have invented a certain new and useful Improvement in Composite Building Material, of which the following is a specification.

My present invention; has relation to an improved composite structure for walls capable of anindefinite number of uses wherever strength is to be combined with extreme lightness. There is a large class of cases wherein these qualities in combination are extremely desirable. In constructing automobiles, for instance, inasmuch as the driving machinery is necessarily heavy, it becomes all the more important that the body should be constructed of the lightest possible. material to lessen the pressure on the tires;- and for this purpose my improved wall material is particularly useful. Aeroplanes, and other forms of devices intended for flight, are coming constantly more and" more into use, and the combined strength and lightness of the composite structure forming the subject of my invention makes it admirably adapted for use in all kinds of flying. machines.

Myimproved material can be easily adapted for use in constructing mot-or boats, racing shells and the like, and indeed numto those skilled in the art.

My invention is illustratedin the accompanying drawing, wherein "Figures 1, 2, 3, 4, and 6 each represents in perspective a portion of a wall made in accordance with a separate modification of said invention, and Fig. 5 is aperspective view of a preferred form ofstifi'ening strip.

In the formshownin Fig. I, I use two sheets of light corrugated material prefer ably vulcanized fiber, 10, 11,- which are placed against each other with their corruatiorls parallel, and are secured together in this position by means of rivets 12v or equivalent fastenings. gated sheets are so arranged, approximately circular channels 13 are formed between them; I prefer to-secure stifiening strips 14, within some of the channels formed between these are placed near togetheror" far apart according to the degree of. stiffness required and the weight permissible. These sti'fi'en angles thereto;

When two corru the-sheets 10 and 11 as hforesaid, and

ing. strips may be made of ratan, wood or other suificiently light and strong material. As shown in Fig. l, I prefer to arrange the rivets 12 in rows along the two sides of the stifiening strips, whereby the letter are the better confined. This arrange,-

ment is not essential to rny invention, howeve In Fig. 2 I have show a modified struc turewherein the sheets 10, 1-1, are laid t6' gther with their corrugations at right. gles to each other. Here the stiflening". strips may occupy some of the corrugations in either one of the sheets. If desired, in deed, stifienin strips may be placed in corrugations of both of the sheets, 10, 11. In Fig. 2 this last named construction is illustrated, and, as shown at 15, some of the stiffening strips, instead of crossing those running at rightangles, are cutoff so as to abut against the latter. This is to avoid a double thimess at points of crossmg. K

In Fig. 3 is shown a. third modification which is within the scope of this invention. Here the corrugations of thetwo sheets run obliquely to each other. forms are intended to illustrate the fact that my invention covers all possible relative positions of the corrugations.

In the modifications so far shown, the stiffening stripstake the form of round bars, and the rivets preferably act to hold the strips by compression from each side. It is equally within my invention to secure the strips by rivets passing through said strips themselves, a's well as through the corrugated sheets. In the modification of my inventionshown in Fig. 4, the stiffening stri s 16, which are flat, are placed between the sheets at i 'ariou's These strips may be made to cross, as shown, and may be located with relationto the specific use to which the material is to be put. The one which I have shown is one which has been found to provide great stiffness, while involving very should run in opposite directions in the alternate layers, as shown in Fig. 5.

Where the flat strips 16 are used, I prefer that some of the rivets, at least, which se- 6,1 prefer three-ply wood veneer. In using this material the grain These different cure the corrugated sheets together should pass-through the stiffening strlps, as shown, thus adding to the firmness of the entire structure by confining the parts more firmly in place.

1 In Fig. 6 I have shown a modification of my device, wherein the corrugations of the two sheets run parallel, as in Fig. 2, but wherein flat strips 16 are interposed where the sheets bend toward each other and between the channels formed by the corrugations.

What I claim is- 1. A composite wall structure comprising two sheets of corrugated vulcanized fiber secured together with stiffening strips of relatively elastic material between them, substantially as described.

2. A composite wall structure comprising two sheets of corrugated vulcanized fiber, rivets securing the same together, and stiffening strips of relatively elastic material secured between said sheets, substantially as described.

3. A composite wall structure'comprising two sheets of corrugated vulcanized fiber secured together, and stiffening strips occupying some of the channels of one of said sheets, substantially as described.

4. A composite wall structure comprising 'two sheets of corrugated vulcanized fiber secured together, and stiffening strips occupying some of the channels of both of said sheets, substantially as described.

5. A composite wall structure comprising two sheets of corrugated vulcanized fiber secured together with their corrugations making an angle with each other, and stiffening strips occupying some of the corrugations of one of said sheets, substantially as described.

6. A composite wall structure comprising two sheets of corrugated vulcanized fiber secured together with their corrugations placed at right angles with each other and stiffening strips secured between them, substantially as described.

7. A composite wall structure comprising two sheets of'corrugated vulcanized fiber, stiffening strips between them occu ying some of the corrugations of one 0 said sheets, and rivets set in rows along the two sides of said strips for securing said sheets together, substantially as described.

8. A composite wall structure comprising two sheets of corrugated vulcanized fiber secured together with their .corrugations making an angle with each other, and stiffening stripsoccupying some of the corrugations in both sheets, some of said rods abuttin at the sides of other rods making an an le with them, substantially as describe 9. A composite wall structure comprising two sheets of light corrugated material secured together by rivets, and light stiffening strips secured between them and occupying some of the corrugations in one of said sheets, substantially as'described.

10. A composite wall structure comprising two sheets of light corrugated material secured together with flat stiffening strips of relatively elastic material. riveted between them, substantially as described.

11. A composite wall structure comprising two sheets of corrugated vulcanized fiber secured together with flat stifiiening strips of relatively elastic material secured between them, substantially as described.

12. A composite wall structure comprising two sheets of corrugated vulcanized fiber secured together with stiffening strips between them composed of a number of thin layers of wood, substantially as described.

13. A composite wall structure comprising two sheets of corrugated vulcanized fiber, fiat stiffening strips between them, and rivets securing the whole together, some of which pass through said strips, substantially as described.

let. A composite wall structure comprising two sheets of corrugated vulcanized fiber, flat stiffening strips crossing eachother between them, and rivets securing the whole together, substantially as described.

15. A composite wall structure comprising two sheets of corrugated vulcanized fiber set face to face with parallel oppositely arranged corrugations, stiffening strips bev tween said sheets placed where they approach each other between corrugations, and rivets passing through said sheets and said strips, substantially as described.

SEYMOUR W. BONSALL.

Witnesses i H. S. Medium, M. A.- BUTLER. 

